The chemical symbol is Mn, with an atomic number of 25, and it is a gray white, hard, and brittle transition metal. It is relatively abundant in the Earth's crust and is the twelfth most abundant element. In nature, it usually exists in the form of compounds, such as manganese ore, mainly including manganese carbonate, manganese oxide, and manganese silicate. It has a wide range of applications in industry, especially in steel production, which can improve the strength and hardness of steel while enhancing its processing performance. Adding can prevent corrosion and wear of steel, thus playing an important role in the manufacturing of wear-resistant steel, stainless steel, and alloy steel. It is also used to manufacture products such as dry batteries, dyes, glass, and ceramics.